20 
Research Bulletin No. 5 
Table 4. — Storing moisture by summer tilling — Concluded. 
PER CENT MOISTURE IN THE SOIL. 
Cane, 1909; summer tilled, 1910. 
Oats, 1910; summer tilled, 1911. 
Date sampled .... 
Sept. 17, 
1909 
Mar. 20, 
1910 
Aug. 8, 
1910 
April 1, 
1911 
June 13, 
1911 
Sept.ll, 
1911 
Oct. 21, 
1911 
Depth in 
foot 
sections 
1 
2 
3 
4 
5 
7.8 
7.9 
8.2 
8.5 
9.1 
9.2 
15.4 
11.3 
9.1 
8.2 
7.8 
9.2 
13.3 
12.8 
11.7 
9.8 
9.0 
10.0 
11.7 
8.0 
8.6 
12.3 
13.0 
14.0 
14.9 
11.7 
7.6 
11.0 
12.4 
13.7 
16.9 
15.1 
10.8 
10.9 
15.1 
16.6 
19.6 
17.7 
13.1 
11.1 
15.0 
13.8 
Average 
8.4 
10.1 
11.1 
11.3 
11.9 
14.2 
15.1 
Spring wheat, 1910 
tilled, 1911 
summer 
Winter wheat, 1911; summer 
tilled, 1912. 
Date sampled 
Mar. 29, 
1911 
June 13, 
1911 
Sept. 21, 
1911 
Apr. 25, 
1912 
June 15, 
1912 
Aug. 8, 
1912 
Nov. 12, 
1912 
Depth in 
foot 
sections 
ri 
2 
4 
5 
k 6 
10.7 
11.5 
7.7 
8.8 
12.5 
14.4 
14.3 
11.7 
8.1 
8.5 
12.0 
13.6 
15.4 
13.9 
11.7 
7.9 
11.2 
13.5 
20.8 
16.3 
9.8 
9.3 
9.7 
8.9 
18.1 
16.3 
15.0 
11.1 
10.4 
9.2 
19.1 
16.6 
14.7 
13.7 
11.0 
10.0 
17.2 
16.1 
15.4 
14.2 
12.0 
9.9 
Average 
10.9 
11.4 
12.2 
12.5 
13.3 
14.2 
14.1 
In Table 4 are given the data obtained from samplings made 
at various times in the fields. The first field given was in spring 
wheat in 1907, and was summer tilled in 1908. Soon after har- 
vest, 1907, the soil contained an average of 9.8 per cent of water 
in the upper six feet. At seeding time in 1908 the soil contained, 
to this depth, an average of 10.8 per cent of water, a gain of 7 
per cent, or about 6.5 inches of water. The rainfall during the 
interval was 19.7 inches, of which about 33 per cent was stored. 
The next field shown was in oats in 1908 and summer tilled in 
1909. In the fall of 1908 the soil was dry to four feet. During 
the winter the first two feet became filled with water. During 
the entire period 5.5 inches of water were stored from a total 
rainfall of almost twenty-three inches. About 24 per cent of the 
seasonal rainfall was held. 
The third field given was in cane in 1909 and summer tilled in 
1910. Almost 2 per cent of water accumulated in the upper two 
feet of soi] during the winter. During the entire summer from 
